Patents by Inventor John D. Thorpe

John D. Thorpe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4650253
    Abstract: A mineral mining pick 1, a holder for such a pick, and the combination of such a pick with a holder 2. The pick has a head 3 with a cutting tip 5 and a shank 4 which is received in a shank socket 6 of the holder 2. Retaining means 7 is provided to releasably secure the pick in the holder. Extending through the pick is a water passage 11 which communicates with outlet ports 12 in the pick head for water flow to suppress dust and cool the tip 5. The passage 11 communicates with a socket 15 which mates with a tubular spigot 13 which is an extension to a fluid supply passage 2a in the holder 2. The spigot 13 is mounted by a resilient sleeve 22 in a tubular housing 19 by which it is removably retained in the holder 2. The sleeve 22 permits displacement of the spigot 13 to accommodate misalignment between the spigot and the socket 15 during coupling thereof as the shank is inserted into its socket 6.
    Type: Grant
    Filed: April 10, 1985
    Date of Patent: March 17, 1987
    Assignee: Padley & Venables, Ltd.
    Inventors: Raymond J. Clemmow, Leonard Radford, John D. Thorpe
  • Patent number: 4583786
    Abstract: The combination of a mineral mining pick and a pick holder. The pick 1 has a shank 4 by which it is received in a socket 6 of a pick holder 2. Extending within the socket 6 is a spigot 13 which mates with a coupling socket 14 in the shank 4 automatically as the shank is inserted into the pick holder. During insertion of the spigot 13 into the socket 14, a frusto conical head 26 on the spigot passes through a resilient ring 25 mounted in an annular recess 24 of the coupling socket so that abutment of a shoulder 27 on the head 26 against the ring 25 retains the pick in the holder.The spigot 13 may be tubular to provide a water coupling from chamber 23 in the holder to passage 11 and ports 12 in the pick for flushing, cooling or dust suppression water supply. The resilient retaining ring 25 may provide a water seal between the spigot 13 and the socket 14.In an alternative arrangement the spigot can be carried by the shank 4 to engage in a coupling socket in the holder 2.
    Type: Grant
    Filed: November 29, 1983
    Date of Patent: April 22, 1986
    Assignee: Padley & Venables Limited
    Inventors: John D. Thorpe, George Joel
  • Patent number: 4573744
    Abstract: A mineral mining pick 1, a holder for such a pick, and the combination of such a pick with a holder 2. The pick has a head 3 with a cutting tip 5 and a shank 4 which is received in a shank socket 6 of the holder 2. Retaining means 7 is provided to releasably secure the pick in the holder. Extending through the pick is a water passage 11 which communicates with outlet ports 12 in the pick head for water flow to suppress dust and cool the tip 5. The passage 11 communicates with a socket 15 which mates with a tubular spigot 13 which is an extension to a fluid supply passage 2a in the holder 2. The spigot 13 is mounted by a resilient sleeve 22 in a tubular housing 19 by which it is removably retained in the holder 2. The sleeve 22 permits displacement of the spigot 13 to accommodate misalignment between the spigot and the socket 15 during coupling thereof as the shank is inserted into its socket 6.
    Type: Grant
    Filed: December 7, 1984
    Date of Patent: March 4, 1986
    Assignee: Padley & Venables Limited
    Inventors: Raymond J. Clemmow, Leonard Radford, John D. Thorpe
  • Patent number: 4488758
    Abstract: A mineral mining pick 1, a holder for such a pick, and the combination of such a pick with a holder 2. The pick has a head 3 with a cutting tip 5 and a shank 4 which is received in a shank socket 6 of the holder 2. Retaining means 7 is provided to releasably secure the pick in the holder. Extending through the pick is a water passage 11 which communicates with outlet ports 12 in the pick head for water flow to suppress dust and cool the tip 5. The passage 11 communicates with a socket 15 which mates with a tubular spigot 13 which is an extension to a fluid supply passage 2a in the holder 2. The spigot 13 is mounted by a resilient sleeve 22 in a tubular housing 19 by which it is removably retained in the holder 2. The sleeve 22 permits displacement of the spigot 13 to accommodate misalignment between the spigot and the socket 15 during coupling thereof as the shank is inserted into its socket 6.
    Type: Grant
    Filed: November 18, 1981
    Date of Patent: December 18, 1984
    Assignee: Padley & Venables Limited
    Inventors: Raymond J. Clemmow, Leonard Radford, John D. Thorpe